How did I get two lots of cash you ask?
Whilst it is against the rules for a person to run two accounts with separate email addresses, it is perfectly acceptable for every member of your household to join and do paid surveys and click on ads. Our family has two accounts with Pureprofile, I fill in one, and my wife does the other.
The surveys and ads are sometimes the same, but often they are different as some are targeted to specific demographics and I guess some companies just arent that interested i what I think about womens products :)